package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.mapper.UserMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    public void submit(Orders orders) {

        //获得当前用户的id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户购物车的数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart>  shoppingCarts = shoppingCartService.list(wrapper);
        //判断
        if (shoppingCarts == null  || shoppingCarts.size() == 0 ){
            throw new CustomException("当前购物车为空,不能下单");
        }
        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        //根据id 查询地址信息
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw  new CustomException("用户地址信息有误,不能下单");
        }

        //工具类 产生唯一的id 生成订单号
        long orderId = IdWorker.getId(); //订单号

        AtomicInteger amout = new AtomicInteger(0);

        //组装订单信息
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) ->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);  //设置订单号
            orderDetail.setNumber(item.getNumber()); //给orderDetail设置数量信息
            orderDetail.setDishFlavor(item.getDishFlavor());// 给orderDetail 设置口味信息
            orderDetail.setDishId(item.getDishId()); //给orderDetail 设置菜品信息
            orderDetail.setSetmealId(item.getSetmealId());//给orderDetail 设置菜品分类信息
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amout.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amout.get())); //总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
            +(addressBook.getCityName() == null ? "" : addressBook.getDistrictName())
            +(addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
            +(addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        //向订单表插入数据  一条数据
        this.save(orders);
        //向订明细表插入数据 多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }
}
